The Nokia Lumia 800 and its sister Nokia Lumia 710 smartphone were officially announced at the Nokia World event this week in London, as part of a tie-up between Nokia and Microsoft agreed earlier in the year.
Equipped with the latest Windows Phone 7.5 'Mango' operating system, the Lumia 800 features a 3.7-inch AMOLED screen, a 1.4GHz processor and an eight megapixel camera based on Carl Zeiss optics.
The smartphone brings together Facebook, Twitter and Linkedin feeds, along with chat and SMS into a single conversation, as well as supports Internet Explorer 9 and Bluetooth 2.1.
After Vodafone recently confirmed plans to retail the handset on mobile contract, T-Mobile has now followed suit, offering the handset in matte black on a variety of payment plans.
T-Mobile, part of Everything Everywhere with Orange UK, said that the Nokia Lumia 800 will be free for customers who take out a £30 per month, two-year price plan.
Other price tariffs have not yet been confirmed, but consumers can pre-order the phone on T-Mobile's website, with further information to follow.
The Nokia Lumia 800 will also be offered by T-Mobile to business customers, with pricing and availability on the business tariffs to "be announced in due course".
Pippa Dunn, the chief marketing officer at T-Mobile UK, said: "The Lumia 800 is a stunning-looking phone and will be a great addition to our handset offering in the run-up to Christmas.
"When matched with one of our flexible price plans, it is the perfect choice for those wanting the latest feature-packed smartphone at an affordable price point."
The Nokia Lumia 800 is expected to hit stores in Britain on November 16, with early indications that the handset will be available SIM-free for £449.95.
Watch a video introducing the Nokia Lumia 800 below: